Closure for ovens



Aug. 5, 1952 T. E. EHAREs cLosURE FOR ovENs Filed Jan. 13, 1949 fit.

Patented Aug. 5, 1952 CLOSURE FOR OVENS Thomas vEsta Phares,Shelbyville, Ind., assignor to Chambersl Corporation, a corporation ofIndiana Application January 13, 1949, Serial N o. 70,717

Claims.

This invention relates to a closure for ovens, and has particularreference to a means for adjusting the door frame to provide a sealing tbetween the door frame and the door.

In order to provide a proper baking atmosphere, ovens must be capable ofretaining heat for a long period of time. Heat loss from the oven due toseepage requires the constant application of heat to the oven, thusmaking the operation of the oven a very costly affair. Additionally, theconstant variations of heat within the oven which are an incident tosuch uneconomical operations make for undesirable baking conditions. Forthese reasons it is essential to have a tight t between the oven doo-rand the front of the oven.

In the better grades of stoves it has been customary to form the doorand the door frame of castings, and to machine the meeting surfaces toprovide as close a t as possible. However, the door frame is frequentlytwisted to a slight extent when the screws by which it is secured to thechassis of the stove are tightened, with the result that the machinedsurfaces do not lie in the same plane and therefore can not formasealing In accordance with the present invention, means are provided toadjust the door frame when it is secured to the chassis so that themachined surface, which engages a machined surface of the door when thedoor is closed, will lie in a single plane. The adjustment of the doorframe is made after the frame is secured to the front of the oven, andany additional adjustment necessary to provide a sealing t with theedges of the door can be made after the door is mounted. Accordingly,nothing can interfere with the proper alignment of the door frame. l

The adjustment means of the present invention is simple and inexpensiveand is concealed by the outer shell of the oven so that it does notdetract from the appearance of the oven.

The structure by which the above advantages are attained will bedescribed in the following specification, taken in conjunction with theaccompanying drawing, in which:

Figure 1 is a fragmentary front View of a cooking stove provided with anoven embodying the invention;

Fig. 2 is an enlarged perspective. View of the front of the oven withthe oven door open;

Fig. 3 is a cross sectional view, taken along the line 3--3 of Fig. 2,but showing the door in closed position; and

Fig. 4 is an enlarged cross sectional view show- 2 ing the top portionof the r top portion of the door closed and in sealingI relationshipwith the frame.

In the drawings, the reference numeral 2 indicates a cooking stovehaving-a front 3 and a door 4 closing the front of an oven contained inthe stove. The door is hinged at its bottom to a hinge lug 5 and latchedatfits top edge by means of a handle 6 engaging a latch 1.

p The door comprises spaced panels 8 and 9 and a casting I0. The castingis of the same shape as the door and ts around the outer edges with oneportion II projecting between panels 8 and 9. The projecting face ofportion II is machined, as indicated at I2, to form a smooth at'surfaceadapted to engage the door frame to form a sealing t. i

The outer surface of panel 8 is preferably coated with porcelain orother suitable material to provide a neat appearance for the exposedsurface. The inner panel may -be finished in any suitable manner, and issecured in place by means of a plurality of screws I3; The'space betweenpanels 8 and 9 islfilled with :insulation I4, preferably rock wool, butwhich may be of any other suitable material, 'Y'

The door frame I5 is a casting which extends around the front-edgesfofthe oven and has a portion I 8 machined to cooperate with machinedsurface I2 of the door to form a sealing fit therewith. A plurality ofscrews I1 secures the door frame to the body front sheet I6 of thestove. 'I'ightening screws I1 frequently cause a slight twisting ofcasting I5, thereby spoiling the proper alignment of the door frame. Inaccordance with the teachings of the present invention, screws I'I arescrewed only part Way into position, and set screws I9 are then adjustedto position the door frame in proper alignment.

The set screws are threaded through threaded apertures in casting I5 andthe forward end of each screw engages body front sheet I6 of the stovewhich is vrig-idly supported from behind by the stove frame, as shown inFigs. 3 and 4. Continued rotation of any set screw, after its forwardend is in engagement with the body front sheet, will force the portionof the casting in the area of the particular screw away from the bodyfront sheet. Each screw I9 is tightened until the door frame is properlyaligned. Then screws Il are tightened to hold the door frame inposition. Although only two set screws are shown, it will be obviousthat any desired number may be used'. If it is found that the door frameis not properly aligned, screws I1 may be loosened until the door framewith theY proper adjustment is made, and then tightened again.

An outer shell 20 extends far enough below screws I1 and I9 to concealthem from view when the stove is completely assembled. The outer shellis cutaway around the front of the oven to permit the hinged door tomove about its hinge.

The oven doorisprovidedat, each endV with a door stop Zlf. Thedoor stopis in the form of a at metal strip shaped in an irregular curve and hasone end rigidly secured to door 4, and the other end projecting througha slot 22 in door frame I5. A stop rod 23 is secured to the end of doorstop 2| inside the body lof the stove, and has a coiled compressionspring 24 encircling it between a pair of washers 25 and'23. Top Washer25 is secured to the stove in any suitable manner, and a nut 21 isthreaded on 'the bottom of rod 23 under washer 26 to provide means foradjusting the spring so that door A11 may function properly; When door 4is opened, the bottom end of rod 23 compressess'pring 124 against topAwasher-25,

thereby cushioning the op'eningmovement of the door. When the door isclosed, the .expansive force 'of spring'24 urges the door `towardsclosed positionv to "facilitate closing Smovement.

Although I have describ'e'd Ja'pref erred embo diment ofzmy invention inconsiderable detailfit will .be understood vthat'the ldescription`thereof is intended 'Sto belillustrative, .rather than .restrictive, as.1n-any Ldetails may be modified or `changed without departing 'from thespirit or scope'o'f my. invention. :Accordinglyl: do not desire to .berestricted .to .the .exact construction described. I claim:

1. In an oven having a front opening, a vbody i front sheet having arelatively fixed surface surroundingisaid front opening, a doorframesecured Aaround the front `ofthe oven in front of saidfbodyrfrontsheet by-means of 1a fplurality of screwsgand .a plurality of set screwsthreaded throughsaid door'frameand engageable with said relativelyxedsurface therebehind to move said door Lframe ,away `fromfsaid xedsurface.

2. In an;.oven vhaving a front-openingfa body Y iront sheet having arelativelyxed suracesurrounding said `front opening, a door iframesecuredaroundfthefront of the voven in front of said body front sheet'bymeans of a pluralityfof screws, aiplurality'of'set screws threadedthroughv saiddoor fr.ameand-engageable Ywith said relativelyvfixed-surface therebehind-to move said-door rarneaway from-saidfxedsurface,- and adoor engaging saiddoor frame., the meeting surfaces ofsaidldoor and door frame being lmachined to provide a close ii't.

3. In an oven having a front provided with an opening therein, a doorframe secured to the front of said oven around said opening, and aplurality of screws threaded into said door frame to engage said ovenfront and said doorY frame, said screws being operable to adjust therelative spacing between said oven front and localized areas of saiddoor frame.

'4. In a cooking stove,`an oven having a Afront provided with anopening, a door frame secured around said opening, a door hinged to oneedge of said door frame, said door having a machined surface shaped toconform to said opening whereby the machined surface of said door may bepodoor frame, a plurality of set screws threaded through said door frameand operable to adjust the spacing of said door -frame relative to thefront of said oven to align said door frame with the machined surface oisaid door, and an outer shell secured to the front of said oven andhaving portions ycut out to permit hinged movement of said door, saidcuter sheli concealing vsaid set screws,

5. In an oven, a door iramecomprising a casting securedto said oven, abody'front sheet providing a xed surfaceon said oven behind said doorframe, a door hinged to engage said door frame, said'door comprising acasting having an `edge the same size as said door frame and en-REFERENCES einen The following referencesiarer of recordin the le ofthis patent:

' UNTLTED sTAfrasPATEN'rs Number Name Date 679,839' Carter et al. Augn,1901 1,618,346 Lartz Feb. 22, 1927 1,851,962 Moi Mar. 29, 1932 1,914,372I-Ivoslef June 29, 1933 2,072,820 Kessler Mar. 2, Y1937 2,091,442 HolmanAug.v 3l, 1937 2,140,408 Sherman Dec. 13, '1938 2,335,329 Whitehead Nov.30, 1943 i FOREIGN PATENTS Number Country Date 485,777 Great-Britain May25, 1938 616,514 Great Britain Jan. 2l, 1949

